Brittle materials fail catastrophically. In consequence of their limited flaw-tolerance, failure occurs by localized fracture and is typically a dynamic process. Recently, experiments on epithelial cell monolayers have revealed that this scenario can be significantly modified when the material susceptible to cracking is adhered to a hydrogel substrate. Thanks to the hydraulic coupling between the brittle layer and the poroelastic substrate, such a composite can develop a toughening mechanism that relies on the simultaneous growth of multiple cracks. Here, we study this remarkable behaviour by means of a detailed model, and explore how the material and loading parameters concur in determining the macroscopic toughness of the system. By extending a previous study, our results show that rapid loading conveys material toughness by promoting distributed cracking. Moreover, our theoretical findings may suggest innovative architectures of flaw-insensitive materials with higher toughness. ArXIV

Concurrent factors determine toughening in the hydraulic fracture of poroelastic composites / Lucantonio, Alessandro; Noselli, Giovanni. - In: MECCANICA. - ISSN 0025-6455. - 52:14(2017), pp. 3489-3498. [10.1007/s11012-017-0621-5]

Concurrent factors determine toughening in the hydraulic fracture of poroelastic composites

Lucantonio, Alessandro;Noselli, Giovanni
2017

Abstract

Brittle materials fail catastrophically. In consequence of their limited flaw-tolerance, failure occurs by localized fracture and is typically a dynamic process. Recently, experiments on epithelial cell monolayers have revealed that this scenario can be significantly modified when the material susceptible to cracking is adhered to a hydrogel substrate. Thanks to the hydraulic coupling between the brittle layer and the poroelastic substrate, such a composite can develop a toughening mechanism that relies on the simultaneous growth of multiple cracks. Here, we study this remarkable behaviour by means of a detailed model, and explore how the material and loading parameters concur in determining the macroscopic toughness of the system. By extending a previous study, our results show that rapid loading conveys material toughness by promoting distributed cracking. Moreover, our theoretical findings may suggest innovative architectures of flaw-insensitive materials with higher toughness. ArXIV
52
14
3489
3498
http://link.springer.com/article/10.1007/s11012-017-0621-5
https://arxiv.org/abs/1702.01318
http://cdsads.u-strasbg.fr/abs/2017arXiv170201318L
Lucantonio, Alessandro; Noselli, Giovanni
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11767/32870
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